RockvilIe RPB25 Bottle Holder Mount Waterproof Bluetooth Bicycle Bike Speaker

Features of the
RPB25: TWS True Wireless Stereo lets you connect 2 speakers together without wires. 40 watts peak power, 15 watts continuous RMS, 360-degree sound dispersion technology, and true 2-channel stereo sound deliver excellent audio quality. The battery charges via the included USB cable; the 3.7V / 2000 mAh battery provides 10 hours of playback at 70% volume.
Charge time: 2.5 hours. Exceptionally loud and powerful. Bluetooth version 2.1 with EDR (enhanced data rate). Bluetooth quick-connect technology pairs with your phone in 5 seconds. A2DP audio streaming with a maximum Bluetooth range of 32 feet. Automatically remembers and syncs with previously paired devices. Playback controls - Play, Pause, Skip Forward, Skip Back, Volume Up, Volume Down. Controls next song, pause, and play on popular apps like Pandora, Spotify, YouTube, and others. The built-in microphone lets you talk through the device, enabling hands-free calls. Works with any Bluetooth devices such as iPad, iPhone, laptops, Android phones, other cell phones, iPods, and other Bluetooth MP3 players.
Material: ABS, rubber, and metal grille.
Input power: DC5V/500mA. Plays SD cards up to 32 GB. Plays USB thumb drives up to 32 GB. 3.5 mm aux input (aux cable included). Built-in FM radio with auto scan. Dual 2-inch drivers with 42-gram magnets, rubber surrounds, and high excursion. The handle makes it easy to carry. No distortion is audible even at maximum volume.
Distortion: less than 1%. Professional voice conformations. Auto power-off after 15 minutes of no music to save battery.
Frequency response: 50Hz 20kHz.
Signal-to-noise ratio: 85dB.
Unit weight: 0.84 pounds